Security readout for executives and security teams
Plain-English summary
CVE-2013-3903 is a Windows kernel driver flaw where a specially crafted TrueType font can force an affected system to reboot. The cited impact is denial of service, not data theft or remote code execution. Business urgency is mainly for legacy Windows 8, Windows RT, and Windows Server 2012 estates still processing untrusted font files.
Executive priority
Treat this as a legacy platform hygiene issue with moderate urgency. It can disrupt availability through reboot, but the supplied evidence does not show active exploitation or compromise of confidentiality. Focus on identifying old Windows systems and confirming Microsoft update coverage.
Technical view
The CVE describes an array index error in win32k.sys kernel-mode drivers during TrueType font parsing. A local user can trigger a system reboot using a crafted TTF file. The source names Windows 8, Windows Server 2012 Gold/R2, and Windows RT Gold/8.1. CVSS, CWE, and detailed fixed-build data are not provided in the bundle.
Likely exposure
Exposure is most likely on unpatched legacy Windows 8, Windows RT, and Windows Server 2012 systems. Risk depends on whether local users or workloads can introduce and process untrusted TrueType font files. Modern or fully updated systems are not confirmed affected by the supplied sources.
Exploitation context
The source supports local denial of service via a crafted TTF file. It does not support active exploitation, remote exploitation, privilege escalation, or code execution. The CVE is not listed as KEV in the supplied bundle.
Researcher notes
The normalized affected list in the bundle is incomplete, so rely on the CVE description and MS13-101 reference for affected platforms. No CVSS, CWE, exploit status, or fixed KB details are included here. Avoid assuming impact beyond local denial of service.
Mitigation direction
- Review Microsoft MS13-101 for the official security update and applicability.
- Prioritize patch verification on legacy Windows 8, Windows RT, and Server 2012 systems.
- Restrict untrusted local users and untrusted font handling where patch status is uncertain.
- Retire or isolate unsupported affected platforms where updates cannot be confirmed.
Validation and detection
- Inventory Windows 8, Windows RT, and Windows Server 2012 assets.
- Check whether MS13-101 or superseding Microsoft updates are installed.
- Confirm systems are not processing untrusted TTF files from local users.
- Document exceptions where affected legacy systems cannot be patched.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2013-3903 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- MS13-101CVE reference · vendor-advisory, x_refsource_MS
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.